Design

West Yost is providing hydrogeologic and engineering for the City’s Grogan Park (formerly known as the Tivoli Well) Production Well. The goal of this project is to construct a new municipal well with the capacity of approximately 1,000 gpm or more without the need for wellhead treatment.

West Yost provided the predesign, design, and construction management and inspection for a partially buried, 3 MG potable water concrete storage tank and a 6,000 gpm booster pump station located in the City’s David Douglass Park.

West Yost evaluated, rehabilitated, and tested the Sunset Well to reestablish well efficiency and normal flow conditions. This project included conducting a condition assessment of the well and down-hole equipment, measuring the well performance before and after rehabilitation including an assessment of the maximum sustainable yield, and sampling for Title 22 drinking water constituents.

West Yost designed a new 4 MG potable water storage tank and booster pump station for the City. Project components included a prestressed concrete tank, pump station building, chlorination facilities, perimeter fencing, landscaping, offsite utilities, and SCADA. Related issues included locating a potential cell tower on the tank site and providing for future delivery of treated surface water to the water storage tank.

The objective of Roseville’s Aquifer Storage and Recovery (ASR) Program is to store surplus drinking water (10,000 acre-feet per year) in the underlying aquifer during periods of normal and above normal precipitation. This stored drinking water is then extracted and served to meet peak demands. West Yost provided design and construction management services for two ASR wells for the City.

The Woodland Davis Clean Water Agency (Agency) and the City, in conjunction with West Yost, conducted an evaluation of ASR as a component of the overall water supply for the Davis Woodland Water Supply Project (DWWSP), designed the first ASR facility for the City, completed construction of the project, and have recently begun injection testing for the ASR well.

West Yost provided planning, design, and construction management for the Ophir Road Pump Station. This pump station constructed about a mile upstream and 210 feet above the Auburn Tunnel outlet, allows Placer County Water Agency (PCWA) to pump water from the tunnel for municipal and agricultural use. It is designed to pump 332 cfs of water through three distinct pump stations, housing 11 vertical turbine pumps ranging in size from 200- to 600-hp.

The West Tank Pump Station and associated transmission mains are part of the improvements required to fully integrate expansion of the City’s treated surface water system with the City’s potable water distribution system. West Yost provided design for construction of a 4 MG welded steel water storage tank, 2 miles of water mains, and a booster pump station with a rated capacity of 12 million gpd. The booster pump station consists of four 150-hp split-case centrifugal pumps, chemical feed, standby power, and electrical controls, housed in a single-story, masonry building.﻿

West Yost has completed preliminary design and is completing final design of two major water transmission mains for the City. An alignment study for the two transmission mains (24- and 36-inch diameter pipes) was required to minimize community and environmental impacts, and assure a cost effective, constructible project. The alignment study included detailed analysis for numerous crossings and evaluation of construction methods. Potential crossings include: Highway 99, Highway 168, Fresno Street, the railroad, and two irrigation canals.﻿

West Yost designed a water main replacement project to replace backyard water mains in a mixed commercial and residential area of Sacramento. On a program level, nearly 30,000 feet of 6/8/12-inch diameter pipelines were replaced. The projects included extensive customer outreach, hydraulic modeling, and a number of innovative approaches to reduce customer impacts and lower construction costs.

West Yost provided predesign, and design services for the Northeast Industrial (NEI) Phase II sewer and water improvements project. The project included sewer main designs, a collection system pump station upgrade, and new water transmission mains.

West Yost provided design and construction support services for 5,000 feet of 18-inch PVC water main to replace three existing 6/8/10-inch cast iron water mains. The project is located on historic East Washington Street and included an investigation of contaminated soils and a trenchless bore and jack crossing under a railroad.

West Yost is responsible for managing and directing technical work associated with the feasibility of implementing an aquifer storage and recovery (ASR) program for the City. This program involves the injection of treated surface water (when available during the winter months) into the groundwater basin for storage and later extraction during peak demand periods or dry years.

West Yost provided design services for a new 6,000 gpm groundwater supply in Sacramento County. Typical production depths in the area yield groundwater with arsenic concentrations that can approach or exceed the 10-µg/l federal Maximum Contaminant Level (MCL). Deeper zones can contain concentrations of manganese, iron and other constituents that exceed secondary MCLs and can require treatment. Groundwater from the wells meets all drinking standards. The wells were designed and constructed to enable sealing of zones that may be affected by water quality changes in the future.

West Yost provided engineering services for this project to supply fluoridated water into the District’s Pressure Zones 1 and 2 of the East Dublin service area from the Alameda County Zone 7 Water Transmission Pipeline. The Pump Station 20B houses a fluoridation system for controlled feed of hydrofluorosilicic acid and pressure reducing/control valves.

West Yost provided planning and design services for the Linne Road Reservoir and Pump Station project. The project consists of the construction of a 7.2 MG, buried, prestressed concrete reservoir, a 21 mgd booster pump station, and installation of approximately two miles of 24-inch transmission main. The facilities are located within a park site adjacent to a baseball field.

The tank is buried and covered with tennis courts. West Yost’s services included preparation of a feasibility report that evaluated alternative site configurations, hydraulic modeling, design, and services during construction.﻿

West Yost designed and provided construction inspection for a new buried 5 MG prestressed concrete reservoir; approximately 8 acres of landscaped park area with tiered, recirculated pond systems, access roads, and drainage improvements; and a new treated-water booster pump station with three vertical inline pumps and adjacent altitude/rate-of-flow control valve and metering facilities.